Metal tube and bar press



July 10, 1928.

H. LORANT METAL TUBE AND BAR PRESS Filqgl May 20, 192? m v m m J H h [J1J1 E m w \\u u b m1 L J Q a l: w W. \m J T a W k o v u \U \NLF J 1 Mr 6W 1 1E w Patented Jul 10, 1928.,

UNITED sTATEs PATENT OFFICE/L."

HUGO LORANT, DUSSELDORF, GERMANY, ASSIGNOR TOSCHLOEMANN AKTIEIN'GESELLSCHAFT, OF DUSSELDORF, GERMANY, A CORPORATION OF GEZIRLMIANY.

- METAL TUBE AND BAR PRESS.

Application filed May 20, 1927. 'Serial No. 192,821, and in Germany July10, 1926.

. My invention relates to presses for producing metal tubes, or bars ofvariousshapes and cross-sections. In presses of this kind, the cylinderfor the press-plunger and the 6 standard for the ingot receiver aremounted on the same base-plate so as to insure perfect alinement. It hasbeen found, however, that where hot ingots are placed in the press,

the ingot receiver and the holder therefor, 10 because of the great heatto which they are subjected will expand, and consequently,

the alinement of the receiver and the cylinder for the press-plunger isdisturbed, or in other words, the central axis of the ingot receiverbecomes displaced relatively to the central axis of the cylinder for thepressplunger. even thickness of the walls of the tubes, requiringsubsequent treatment of the tubes in drawing machines, which involvesconsiderable expenditureof time and money.

, To obviate this defect is the object of the present invention,according to which the ingot receiver or the holder therefor rests onspecial supports,

by the heat of the hot ingot, so that the central axis of the ingotreceiver remains in true line with the central axis of the cylinder forthe press-plun er and of the latter, no matter so how great the ieatimparted to the ingot receiver. The supports which may be air? orwater-cooled, are mounted on the same baseplate with the cylinderfor'the press-plunger.

In the appended drawing, on whichI have as shown an embodiment ofmyinvention by way of illustration, Fig. 1 is a central vertical sectionthrough a well-known press for making metal tubes not embodying thepresent invention, Fig. 2 being a cross-section 40 of the same alongline 2-2 in Fig. 1; Figs.

3 and 4 are similar views as Figs. 1 and '2 showing a press embodyingthe present invention, 'Fig. 4 being a section along line 44 in Fig. 3.

In all the figures, the same reference letters havebeen used todesignate identical parts.

The press, as shown in the drawing, comprises a cylinder a, thepress-plunger b in said cylinder, the ram 0, carrying the perforatingmandrel c, the holder d, the ingot receiver e, the matrix f and thecommon base-plate g,

This results, of course, in an unwhich remain unaffected- In the pressshown in Figs. 1 and 2, the cylinder a and holder d are mounted on thebase-plate g. When a hot ingot is placed in the ingot receiver 6, thelatter and thereby also the holder 0! become very hot, with the resultthat the lower portion 5 of holder d (Fig. 2) becomes expanded by theheat and the horizontal central plane of the ingot receiver 6 becomesdisplaced relative to the horizontal central plane of the press-plungerb.

Now, in the pressshown in Figs. 3 and 4, the holder 03 for the ingotreceiver is not directly mounted on the base-plate 9, but

"axis of the ingot-receiver will always remain in exact alinement withthe central axis of the press-plunger, no matter how high thetemperature of the ingot receiver 0 may use.

In place of the supports it also a frame may be used in which the holderd is suspended, and it is obvious that other modi-' fications may bemade without any departure from the essence of the present invention.

I claim: 1 I

1. In a. horizontal metal tube extrusion press, the combination with thebase-plate, of an hydraulic cylinder mounted thereon, a press-plunger insaid cylinder, an ingot receiver, and means unaffected by "the heatimparted to said ingot receiver for supporting the same in a horizontalcentral plane so as to permit free expansion in all directions withoutdisplacement of the central axis of said receiver.

2. In a horizontal metal tube extrusion press, the combination with thebase-plate, of an hydraulic cylinder mounted thereon, a press-plunger insaid cylinder, an ingot receiver, a holder therefor, and sup 'ortmgmeans for said holder unaflected'by the heat impartedto said .receiverso as to support the same in a horizontal central plane pe r mittingfree expansion in'all directions without displacement of the centralaxis of said unefi'ectedby the heat imparted to said ,inreceiver.got-receiver for supporting the same in a.

3. In a horizontal metal tube extrusion horizontal central plane'Without displace- 10 I press, the combination with the base-plate, mentof the central axis of said receiver.

5 of en hydraulic cylinder mounted thereon, lln testimony whereof Iafiix my signature.

a press-plunger in said cylinder, an ingotreceiver,'e holder therefor,and two supports HUGO LQRANT.

